I have had a look on the internet, and it says that the main reason babies need formula is to supply them with plenty of iron. If I were you, I'd make sure that the solids your dd is eating are full of iron and Vit C. Here's a bit from the internet...
"Animal sources of iron include liver, kidneys, red meat, poultry, fish (especially oysters and clams), and eggs. Plant sources of iron include peas, beans, nuts, dried fruits, leafy green vegetables (especially spinach), enriched pastas and breads, and fortified cereals.
To optimize the amount of iron you get from plant foods, eat them with a food high in Vitamin C at the same meal. Foods high in Vitamin C include broccoli, tomatoes, greens, sweet potatoes, white potatoes, cantaloupe and citrus fruits."
hope this helps.